package com.ziyueyuwen.xiniao.util;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import com.suyeer.basic.util.LogUtil;
import org.apache.commons.lang3.StringUtils;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.OutputStream;
import java.util.Hashtable;

/**
 * @author jun 2019/3/8
 */
public class QrCodeUtil {
    private static final String FORMAT_NAME = "JPG";
    /**
     * 二维码尺寸
     */
    private static final int QRCODE_SIZE = 300;

    /**
     * LOGO宽度
     */
    private static final int WIDTH = 100;

    /**
     * LOGO高度
     */
    private static final int HEIGHT = 100;

    private static BufferedImage createImage(String content, String logoImgPath, boolean needCompress) throws Exception {
        Hashtable<EncodeHintType, Object> hints = new Hashtable<>();
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        hints.put(EncodeHintType.CHARACTER_SET, ConstUtil.DEFAULT_ENCODE);
        hints.put(EncodeHintType.MARGIN, 1);
        BitMatrix bitMatrix = new MultiFormatWriter().encode(content,
                BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
        int width = bitMatrix.getWidth();
        int height = bitMatrix.getHeight();
        BufferedImage image = new BufferedImage(width, height,
                BufferedImage.TYPE_INT_RGB);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
            }
        }
        if (StringUtils.isBlank(logoImgPath)) {
            return image;
        }
        // 插入图片
        insertImage(image, logoImgPath, needCompress);
        return image;
    }

    /**
     * 插入LOGO
     *
     * @param source       二维码图片
     * @param logoImgPath  LOGO图片地址
     * @param needCompress 是否压缩
     * @throws Exception Exception
     */
    private static void insertImage(BufferedImage source, String logoImgPath, boolean needCompress) throws Exception {
        File file = new File(logoImgPath);
        if (!file.exists()) {
            LogUtil.error("该文件不存在 :{}!", logoImgPath);
            return;
        }
        Image src = ImageIO.read(new File(logoImgPath));
        int width = src.getWidth(null);
        int height = src.getHeight(null);
        if (needCompress) {
            if (width > WIDTH) {
                width = WIDTH;
            }
            if (height > HEIGHT) {
                height = HEIGHT;
            }
            Image image = src.getScaledInstance(width, height,
                    Image.SCALE_SMOOTH);
            BufferedImage tag = new BufferedImage(width, height,
                    BufferedImage.TYPE_INT_RGB);
            Graphics g = tag.getGraphics();
            g.drawImage(image, 0, 0, null);
            g.dispose();
            src = image;
        }
        // 插入LOGO
        Graphics2D graph = source.createGraphics();
        int x = (QRCODE_SIZE - width) / 2;
        int y = (QRCODE_SIZE - height) / 2;
        graph.drawImage(src, x, y, width, height, null);
        Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
        graph.setStroke(new BasicStroke(3f));
        graph.draw(shape);
        graph.dispose();
    }

    /**
     * 生成二维码(内嵌LOGO)
     *
     * @param content      内容
     * @param logoImgPath  LOGO地址
     * @param destPath     存放目录
     * @param needCompress 是否压缩LOGO
     * @throws Exception Exception
     */
    public static void encode(String content, String logoImgPath, String destPath,
                              boolean needCompress) throws Exception {
        BufferedImage image = createImage(content, logoImgPath, needCompress);
        mkdirs(destPath);
        String file = com.suyeer.basic.util.DateUtil.getTimestampString() + ".jpg";
        ImageIO.write(image, FORMAT_NAME, new File(destPath + "/" + file));
    }

    /**
     * 当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)
     *
     * @param destPath String
     */
    public static void mkdirs(String destPath) {
        File file = new File(destPath);
        if (!file.exists() && !file.isDirectory()) {
            file.mkdirs();
        }
    }

    /**
     * 生成二维码(内嵌LOGO)
     *
     * @param content     内容
     * @param logoImgPath LOGO地址
     * @param destPath    存储地址
     * @throws Exception Exception
     */
    public static void encode(String content, String logoImgPath, String destPath) throws Exception {
        encode(content, logoImgPath, destPath, true);
    }

    /**
     * 生成二维码
     *
     * @param content      内容
     * @param destPath     存储地址
     * @param needCompress 是否压缩LOGO
     * @throws Exception Exception
     */
    public static void encode(String content, String destPath,
                              boolean needCompress) throws Exception {
        encode(content, null, destPath, needCompress);
    }

    /**
     * 生成二维码
     *
     * @param content  内容
     * @param destPath 存储地址
     * @throws Exception Exception
     */
    public static void encode(String content, String destPath) throws Exception {
        encode(content, null, destPath, false);
    }

    /**
     * 生成二维码(内嵌LOGO)
     *
     * @param content      内容
     * @param logoImgPath  LOGO地址
     * @param output       输出流
     * @param needCompress 是否压缩LOGO
     * @throws Exception Exception
     */
    public static void encode(String content, String logoImgPath,
                              OutputStream output, boolean needCompress) throws Exception {
        BufferedImage image = createImage(content, logoImgPath, needCompress);
        ImageIO.write(image, FORMAT_NAME, output);
    }

    /**
     * 生成二维码
     *
     * @param content 内容
     * @param output  输出流
     * @throws Exception Exception
     */
    public static void encode(String content, OutputStream output) throws Exception {
        encode(content, null, output, false);
    }

    public static void main(String[] args) throws Exception {
        String text = "https://wx.ziyueyuwen.com/123456";
        encode(text, "/Users/jun/Desktop/file/0.jpg", "/Users/jun/Desktop/");
    }
}
